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MELBOURNE, AUSTRALIA - JANUARY 31: Roger Federer of Switzerland poses with a cake presented to him after becoming World Number One during day thirteen of the Australian Open Grand Slam at Melbourne Park January 31, 2004 in Melbourne, Australia. (Photo by Daniel Berehulak/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 31: Roger Federer of Switzerland poses with a cake presented to him after becoming World Number One during day thirteen of the Australian Open Grand Slam at Melbourne Park January 31, 2004 in Melbourne, Australia. (Photo by Daniel Berehulak/Getty Images)